Negative locating device for step and repeat printing apparatus



E. BASSIST Juhe 3; 1930.

NEGATIVE LOGATING DEVICE FOR. STEP AND REPEAT PRINTING APPARATUS Original Filed Sept. 24. 1926 4 Sheets-Sheet l Elwuem'toz Eu /.5 BA L ST 35 GUM/14043 June 3 19 30. I BA$$|sT 1,76I,863

NEGATIVE LOCATING DEVICE FOR STEP AND REPEAT PRINTING APPARATUS Original Filed Sept. 24, 1926 4 Sheets-Shet 2 avweuroz E. BASSIST J lie 3, 1930.

NEGATIVE LOCATING DEVICE FOR STEP AND REPEAT PRINTING APPARATUS 4 Shets-Sheet 5 Original FiIed Sept. '24, 1926 Snowboa- EZL/SBASS/ T X an fl ibl N MN WM J: 5: v .w in 5 \%M 4 hm am mm NM Mm Jun 3, 1930.' A

E. BASSIST 1,761,863

I NEGATIVE LOCATING DEVICE FOR STEP AND REPEAT PRINTING APPARATUS OriginaI Filed Sept. 24. 1926 4 Sheets-Sheet 4 Hwuentoz E2415 Exis s/s7- which:

Patented-June 3; 1930 11mm srATEs PATENT; OFFICE v ELLIS nassrsr, or MILWAUKEE, wrsc'oirsm 100mm, 0E BROOKLYN, NEW Y0 ASSIGNOR To 1*. WESEL MANUFACTURING BK, A' CORPORATION or EEw'YoRx NEGATIVE, LOGATING nEvIo Eon s Er AND REPEAT PRINTING APPARATUS I Application filed jseptemher 24, 1926, serial The invention relates to locating apparatus for locating a photographic negative or positive in a'necessary position upon, or within, v a-carrier or holder. More especially, the in? vention relates to apparatus whereby a negative may readily and accurately be positioned with respect to the carrier which. is then to be transferred tothe photo-printing machine for making a printing plate from said negaw tive. In such phot'o printing apparatus, the

saidcarrier is successively located in vari 'ous positions relatively to'the press plate, tho

each particular step is itself first-accurately determined-negativ'es of differentcolor values, for example, being utilized in identical positions over corresponding plates. It,

will thusbe apparent that extreme accuracy is necessary in the location of the negative relatively to its carrier as well as to the printing plate, and particularly so with reference 7 to the other negatives of the same'series which havehdiflerent color values and which must be printed in absolute register in order to I obtain perfect results. With. the structure forming the subject of" the present invention such accuracy in the location of negatives t0 carrier'or holder is readily attainable and the negative not necessarily restricted to the cen-- ter position of its carrier or frame,-as has been the practiceheretofore. In carr f g out the .invention, asuitable table having graduations at its sides is provided for supporting the negative holder, and there is associated with-said table measuring members movable 5 thereover and whereby the position 'of a nega tive on the carrier may positively and accurately be determined. Provision is made,

' also, for temporarily looking a negative to the face of the carrier while'it is being more per- 40 manently secured thereto. after having been.

accurately-positioned.

The nature of the invention, however, will best be understood when described in connection with the accompanying drawings, in

' Figure 1 is a device. 4 x

Figure l is a perspective view of a novel form of the negative carrier.

Figure 2 is a 'detail ,fragmentary the movable bridge member employed in the locating device. 4

Figures 3 and 4 are fragmentary longitudinal sections, taken respectively on the. lines 3-3 and 4- 1, F' the direction of the-arrows,

Figure 5 is a fragmentary plan showing one of the slides adjustably mounted on the bridge member. Figure6 is a fragmentary longi tion thru a s away. 7

Figure 7 is a transverse vertical section, taken on the line 77,Figure 6. i

Referring to the drawings, 10 designates a table suitably supported as by a frame'll, and from thetop of which ishung anen closing compartment 12 for a lamp or like means of illumination 13. The topof the table over the said compartmengportion is 7 covered with a sheet of etched or translucent glass lt'thru which diffused light may be caused to shine when'the illuminator 18 is burning-and thus afford ample illumination in effecting the precise adjustment required in locating a negative, as the negative 20, relatively to its carrier. The latter may consist of the usual four-sided frame with transparent glass plate 21 designed to rest on the glass top '14 and is accurately positioned relative-- so 1y to the top 10 thru one of itsframe pieces 22, which is supported on a ledge 23 as by dowels 24 fitting corresponding openings of the frame piece and ledge and thus insuring I always return of the holder to the same position relatively to the top. InFigure 1", a preferred and simplified form of'frame or plate holder is disclosed and wherein the glass plate 21 is retained only by single bar member Renewed November 29, 1929.

perspectiveview of the novel i tudinal sec aid slide, with portions broken as the strip of metal 22' to which the glass plan of 50 igure 2, and looking in plate is rigidly secured as by means of suitable adhesive or cement 23. This type of carrier is considerably lessexpensive to construct than the frame illustrated in Figure 1, and allows of covering substantially the entire surface of the printing plate with prints. The plate 21 is adapted to support the negative which may be attached thereto after the negative has been properly located, in any well known or special manner, for example, by blocks 26 and adhesive strips 27 attached at various portions of said negative. Provision is made also for enabling the carrier to be placed eithertat the front of the top as indicated in Figure 1, or along one side.

In locating the negative 20 in its carrier, use is made of a bridge member or traveling carriage 30 which extends over the top from one side to the other, being movable thereon over the glassportion 14, one end of the bridge for this purpose resting on the finished edge 31 at one side of the top and-the other end on a triangular way 32 of the other side. Bridge 30 is designed to be locked securely to the said edge 31 and to the way 32 by suitable clamping members 33 and'34 respectively; anda slight rocklngmotion is allowed the same thru an oppositely tapered bearing block 33' at one side. Ver: nier adjusting rods 35 and 36 connect respectively the clampingm embers 33 and 34 with the carriage. The two sides of the top are suitably graduated as by means of scale plates 37 set therein; and a Vernier 38 is associated therewith and mounted'on a bridge at each end, said bridge being movable for"- final adjustment by means of the adjusting rods 35 and 36 after the clampingvmembers 33 and 34 have been set to secure the bridge at each side of the top; By this means, a precise adjustment of the bridge may be had relatively to the positioned negative carrier 21, the bridge being finally secured in the se-- lected position by further clamps 39. Thru the rockingmovementpermitted, the bridge 30 may swing as awvhole slightly about the one end and, thus accommodate irregularly placed guide marks;

Moreover, there is mounted to slide on said bridge a pair of slides 40 which are adjustablelongitudinally of the bridge, similarly to the adjustment of the bridge on the sides of the table top, being clamped to said 1 bridge by clamping screws 41. Each of. said slides 40 carries, also, a transparent member or plate 42 provided with cross marks or register marks 43, which are designed to register with similar marks 44 of the negative when 'thelatter is properly positioned. In order to facilitate this registering of the cross marks 43 with the register marks 44, the

former are arranged to be carried by awtransparent plateof a vertically movable frame 45 which may be depressed, by a pair of rods 46 attached thereto, inprox-imity to the therein.

surface of the negative 20 and held in position by set screws 47 until the adjustment is effected. For this purpose, graduations 48 with Vernier 49 are provided respectively along the sides of the bridge and on the slide in order that the longitudinal position of a slide may be accurately set, the trans verse position having been determined in the setting of the bridge 'as previously set forth. Thus, both a transverse and longitudinal reading are obtainable; and the bridge and slides, if disturbed, may quickly and readily be returned or set to their previous positions by taking note of the original readings.

It will be understood that after the bridge and slides have been set to the desired positions, the negative 20 will be manually adjusted on its carrier 21 to bring the indicator marks 44 thereon into registry with the cross marks 43 of the slides. After this adjust. ment of the negative it becomes necessary to securely hold the same to the glass 21, which is accomplished by means of the blocks 26 and the adhesive strips 27; and, during this period; of attachment, it is desirable to maintain said negative against dislodgment from its adjusted position. To this end, each of the slides 40 is provided with a laterally extending bracket 50 which is designed to project over the negative and carries an adjustable screw 51 which is vertically movable At its lower end screw.. 51 is covered with a.-shoe of resilient material, as a pad of rubber 52, which is designed to engage the upper surface of the negative 20 and press the latter against the glass 21 upon which it rests, thus serving to hold it fixedly in the adjustedposition until said negative has been secured to the glass plate as aforesaid. In order to prevent rotation of the pad or shoe 52 with consequent tendency to shift the negative from its adjusted position, the lower end of the screw 51 is fitted with a head 53 to which the pad is secured, the screw being rotatable relatively to said head and shoulder-' ing against its upper surface. At the lowermost end of thescrew the same is fitted with a flange 54 fitting a recess 55 of said head,

the said head being further-insured against rotation in the operation of the screw by a rod 56 which extends downwardly from the bracket. into the said head. I

When the negative has thus been properly secured in the desired-position relativelyto ts frame, the latter may be removed from the table by sliding the same. therefrom, thru the back after first removing the dowel pins. It is then transferred to a photo-printing machine or a step and repeat printing apparatus (not shown) for making the desired printing plates. Whena new negativeis required, the frame is returned to the locat-' ing apparatus aforementioned and the new. negative accurately positioned relative to the frame as hereinbefore described, the exact e v i projecting light therethru to then'egatlve; of

I table provided with position being readily determined by resetting the bridge and slide members to correspond to the readings previously utilized ifin the meantime the locating apparatus may have beenutilized for positioning other negatives and thus have disturbed the, original adjustment. Otherwise, .it will be necessary merely toset the negative holder in place on the top of the'table 10 and adjust the nega-' tive therein to bring its indicator marks into register with those of the slide members.

I claim: e

1. The combination with a supporting table provided with a translucent top having scales along its sides and adapted to support in pre determined position a, carrier bearing a negative provided with register marks,and a source of illumination beneath said top for projecting light therethru to the negative; of a bridge member slidable over the said top along its sides and cooperating with the scales thereof for setting the bridge in predetermined positions, means to secure the bridge in selected. position, slides movable along the bridge, and scales on said bridge for cooperation with the slides in setting the same in selected position, said slides bearing indicator marks for registry with correthe negative.

sponding marks on .i v 2. The combination with a supporting scales along its sidesand adapted to support in predetermined position a carrier bearing a negative provided with register marks, and

a source of illumination beneath said top for projecting light therethru to the negative; of"

a bridge member slidable over the said top along its sides and cooperating. with the scales thereof for setting the bridge in predetermined positions, means to secure the bridge in selected'position, slides movable and means to hold the carriage in depressed along the bridge,

along the bridge, scales operation with the slides in setting the same a dep'ressible carriage movablewitha slide and having a transparent bottom plate bearing register marks,

position in negative. t.

3. The combination with a, supporting proximity to the top of the table provided with a translucent top having,

scales along its sides and adapted to support ,inpredetermined position a carrier bearing a negative provided with register marks, and asource' of illuminationbeneath said top for scales thereof for setting the bridge in predetermined positions, means to secure the}.

bridge in selected positidn, slides movable scales onas'aid bridge for cooperation with the slides in setting the same I in selected position, said-slides bearing indica'tor marks for a translucent top having" on said bridge for 00-" registry with corresponding marks on the negative, and a'holding shoe carried by each of the slides and adjustable toward the top of the negative for engagement therewith to hold the same temporarily to its carrier during the period of securing the former negative has'been positioned in the selected position. 4

4. The combination with asupporting table provided with a translucent top having .scales along its sides and adapted to support in predetermined position a carrier bearing a negative provided with registen marks, and'a source of illumination beneath said top for projecting light therethru to the negative; of a bridge member slidable over the saidtop along its sides and cooperating with the scales thereof for setting the bridge means to secure the negative, and brackets carried respective- I 1y by each of said slides, a shoe adjustably mounted therein for movement toward the top of the negativefor engagement therewith to hold the same temporarily/to its carrier duringihe' period of securing the former to the latter a ter said negative has been positioned in the selected position.

5. The combination table provided with a translucent top having scales along its sides and adapted to support in predetermined position a carrier bearing a negative provided with register marks, and a source of illumination beneath said top for projecting light therethru to the negative; of a bridge member slidable over along its sides and cooperating with the scalesthereof for setting the bridge in pre-' determined positions, means to secure the bridge member tothe'top when positioned and including a bearing permitting an an gulanmovement of the carriage, slides movable along the bridge, and scales on said brid e for cooperation with the slides in setting t e same in selected position, said'slides bearing indicator marks for registry with corresponding marks on the negative.-

6. The combination, with a} sup orting table provided with a translucent to aving scales along its sides and adapte to support in predetermined position a bearing a negative provided withmarkspsaid table the top to permit positioned negative,- andasource-of ill11mina-' 'tion beneath said top-for therethru to .the negative; 0 her slidable register being openat the rear of with a supporting removal of the carrier with to'the latter after said the said top v a carrier Y and cooperating with the scales thereof vfor setting the bridge in predetermined .positions, means to secure the bridge in selected position, slides movable along the bridge, and

scales on said bridge for cooperatlon with the slidesin setting the same in selected position, said slides bearing indicator marks for registry with corresponding marks on the negative.

In testimony whereof I affix my signature.

ELLIS BASSIST. 

